The previously announced April 1 concert by ADLER, the band led by former GUNS N' ROSES drummer Steven Adler, at the Whisky A Go Go in West Hollywood, California has been canceled, according to a tweet from the venue's official Twitter account. The message adds, "Stay tuned for a big announcement! #GunsNRoses"

GUNS N' ROSES has so far announced six headlining performances in April, including two in Las Vegas and two at California's Coachella Valley Music and Arts Festival, with singer Axl Rose, guitarist Slash and bassist Duff McKagan slated to perform together again for the first time in 22 years.

The rest of the band's lineup for the shows — and a potential tour later in the year — remains unclear, although keyboardist Dizzy Reed, guitarist Richard Fortus and drummer Frank Ferrer are all believed to be involved.

Fan speculation around the involvement of Adler has been heavy, with some of the bandmembers reportedly not sure whether the drummer, who has a longer history of drug problems than any of the other musicians, can hold it together on the road.

Adler was fired from GUNS N' ROSES in 1990 for his rampant drug use and replaced by Matt Sorum. Fans have wondered whether both drummers would be brought back for a reunion tour.

Adler said last October that he would be the last person to hear about his involvement in a GUNS N' ROSES reunion because Slash couldn't trust him to keep the information secret. "I've known for Slash thirty-what… thirty-nine years, and he knows that I would climb to the [highest] mountain and I would do, as Paul Stanley would say, 'shout it out loud,'" he said.

Adler told VH1 Classic's Eddie Trunk in a separate interview about the possibility of his involvement in a GN'R reunion: "I love those guys, and I always will, but Duff, he doesn't think I'm cool. And Slash, he doesn't believe that I have [two years] sober. He doesn't believe it. I don't know why, but they forget that at one time in their life, they were doing drugs and drinking and they were fucking up. They forget that they were like that too. Duff has got 20 years sober or more, Slash has got, like, 11 or 12 years sober, and I've got [two years]. So everybody gets it at a different time. I'm just thankful I got it."

He expressed frustration that the original GUNS had not reunited, saying, "I don't get it. We just play music. We're living our dream. When we're together, we play it really great. Let's just do it. What's the problem?"